Portable crane



May 20, 1.930. w. JoBl-:s

PORTABLE CRANE Filed April l2, 1928 3 Sheets-Sheet l .May zo, 1930.V 'lw. JOBES 1,159,406

PORTABLE CRANE Filed April 12, 1928 Sheets-Sheet 2v Inventor Wzl/iwiJoees' )I May zo, 1930. w. JOBESV A 1,759,406

' PORTABLE CRANE Filed April 12, 192eA s sheets-'sheet 5 InventorWai/noi' Jbeef Patented May 20, 1930 UNITED; STATI-:s

l 'KWILMoT JoBEs, oF ATLANTIC CITY, NEW JERSEY PORTABLE CRANEApplication filed April 12,

` 10 a turntable structure for the supporting base of the crane. Inpractice this supporting base is turned to various positions tofacilitate handling of the load by the changeable boom. The variance inthe loads to be L hoisted frequently renders the manipulation andhandling of a structure of this class unsafe. A small crane,vwhosecapacity is limited is frequentlyy employed in attempting to liftloads which are too heavy for it'. The

v720 result is that the entire structure topples over. Of course in thepresent crane structures to counteract this, rigid or stationary weightsare provided, these'being constructed p of scrap iron, concrete and thelike arranged in appropriate casings or containers.

In order to give a small crane structure a greater range of use andtorender it safer and more susceptible to proper operation, Y haveevolved andproduced a novel adjustable Weight structure wherein theweights are arranged to'counter balance the load and to preventaccidental overturning of the structure. v

The particular details and their relative arrangement and associationwill become more readily apparentv from the following description anddrawings.

Inthe drawings Figure 1 is anelevational view of a structure constructedin accordance with the present invention, n v

Figure 2 is a top plan view of the complete structure,

Figure 3 is a central vertical section taken approximately upon theplane of the line 3-3 of Figure 1,r s

Figure l is a detail section taken vapproxil mately upon the plane ofthe line 4-4 of Figure 2, l

192s; serial No. 269,376.

Figure 5 is a detail of the footpedal operated latch. y p Referring Vnew,to thel drawings and particularly to Figure 1 it will be seen that thektruck is generally designated by the numeral 555 6, the same comprisinga platform 7 and flanged supporting wheels 8- adaptedfor movement alongthe tracks or rails 9. Mount'- ed on the platform v7 is a turn-table 10on lwhich the rotatable part ofthe structure is c supported.

ASF-showny in Figure 3 therotary part of the' structure comprisesk asuitable base 10 lon which the principal novelty of this invention islcarried.A It is desirable however', V65 to consider the old parts'first.To this end it will be seen that 12 designates the steam boiler on oneend and 13 al swingable hoist# ing boom on the opposite end. Positionedclose to the hoisting boom is aA drum ll'on JT-fo 'which the vhoistingcable 15 is wound. On one endA of thel drum isa driving gearl Vwhichreceives motion from the main drive shaft 17 (see Figure'3). This shaftis provided with customary' driving gears and clutchdevices 18controlled in the usual way. There is a small gear 19 on one end whichis in mesh with the gear 16. On'the opposite endY are found eccentrics20 and` operating pitmen V21 operated from the sliding crosshead 22 (seeFigure 1) and the steam .power means here shown. y J

`In carrying out the present vinventions-I provide a pairl of spacedparallel-shafts 23 and 24 which as shown in Figure ll are on as a planewith each other and on a .plane above the main driving shaft 17. Locatedbetween these shafts 23 and 24 and on a lower plane is another shaft 25having winches 26 on its opposite ends. Confining attentionfinore par#ticularly to )Figure 2 it will be seen that ay large gear 27 `is carriedby the outer end. of the shaft 23, this being in mesh with acorn@pleinental gear 28 on theshaft '24: as'shown` in Figure 1. On theintermediate portion of the shaft 23 isa fixed gear 29'in mesh with anidler gear 30 on the intermediate vportion of the shaft 25. Asimilar'idler3-1is `on the outer end ofthe shaft .25A and Vvin permanent,mesh'with a driving gear 32 on thefshaft v24:: i60

Arranged between the idling gears 30 and 31 is a clutch 33 operated fromthe swingable actuating arm 34 and a hand( controlled lever 35. MountedYWithin the vicinity of this Winches 26.

lever 35 is a foot pedal-36 Von a rock shaft 37 Which rock shaft carriesa ndog* 38 cooperating with the locking gear 39 Von the shaft 25V (seeFigure v5). This .arrangement of lintermeshin'g'gears, idlers, andclutch permits the shaft to be rotated at the discretion ofthe operatorin either direction for rotating the Mounted rigidly on opposite sidesof the base 11- as shown in Figure 3 are` channelshaped boxes 40 havingtheir open ysidesV dissaid Winch shafts, manually operatedl clutchmechanism operatively connecting the power shaft and winch shaft, a pairof 'channel shaped casings mounted on opposite longitudinal edges of thebase and provided with spaced transversely extending anti-frictionrollers, counter-balancing Weights slidablein the casing andupon thelrollers, .and operating cables connected with the Weight andwound uponthe Winches.V Y

In testimony whereof I affix my signature.

rWILMOT JOBES.

posed downwardly and equipped withlongiv tudinally spaced anti-frictionrollers 41. Loy i ygrswity to prevent overbalancing of the strucytureincase theload liftedby the boom is too Y Y heavy.; Y It is evidentthatwiththis arrangement the counterbalanc-ingweights can be set Y.preparatory toli'fting the load or they can vbe 'Y Y' Y moved While theload is being lifted orlowered and they can be returned to normalposivtion at the discretion of thefoperator, vall Vof this beingpermitted bythe cable actuated Y roller supported weightscooperating'with Y descriptionfis regarded'unnecessary. Y Minor ychanges1n shape, size and rear- V50 thel clutch controly Winches on'thelsupplemental shaft, and thesame power utilized toadjust these Y Weightswhich., is 'employed Y for operating the Winding drum andboom. V:

; It isbelieved that by carefully considering the description inconnection with the dra-W- ings, Vagclear understanding of theconstruction Yand operationof the improved machine willV be had.Consequently, amore lengthy f rangement kof parts coming within the eldof invention desired. 'Iclaimh-- c L i Y In a hoisting crane of theclassdescribed, a

Wheel Vsupportedftruck, a turn table mounted thereon, a base onvv theturn table, av steam power plant on the base, a boom pivotallymounted onthe base, av drum mounted forV rotation on the base, a boomoperating-cable connected with the boomy and mounted on the drum,'fa;power shaft, an operating connection Abetween thepowershaft and powerplant, ani operating connectioliibetween the shaft and Vv,said drum,afsupplemental vWinch :shaft on said base, Winches onltheoppositefendsof claimed may be .resorted to if

